Description
The IR51H420 is a high voltage, high speed, self oscillating half-bridge. Proprietary HVIC and latch immune CMOS technologies, along with the HEXFET® power MOSFET technology, enable ruggedized single package construction. The front-end features a programmable oscillator which functions similar to the CMOS 555 timer. The supply to the control circuit has a zener clamp to simplify offline operation. The output features two HEXFETs in a half-bridge configuration with an internally set deadtime designed for minimum cross-conduction in the half-bridge. Propagation delays for the high and low side power MOSFETs are matched to simplify use in 50% duty cycle applications. The device can operate up to 500 volts.

FEATUREs
■ Output Power MOSFETs in half-bridge configuration 500V Rated Breakdown Voltage
■ High side gate drive designed for bootstrap operation
■ Accurate timing control for both Power MOSFETs Matched delay to get 50% duty cycle Matched deadtime of 1.2us
■ Internal oscillator with programmable frequency
■ Zener clamped Vcc for offline operation
■ Half-bridge output is out of phase with RT